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A337978 as a simple table

na(n)
11
21
32
43
54
65
76
87
97
108
1110
1210
1311
1412
1513
1614
1715
1816
1918
2019
2119
2220
2321
2422
2523
2624
2725
2825
2927
3028
3129
3229
3330
3431
3532
3632
3734
3835
3936
4037
4138
4239
4341
4442
4542
4643
4744
4845
4946
5047
5148
5248
5350
5451
5551
5652
5752
5853
5955
6056
6157
6258
6359
6460
6560
6661
6763

[1,1,2,3,4,5,6,7,7,8,10,10,11,12,13,14,15,16,18,
 19,19,20,21,22,23,24,25,25,27,28,29,29,30,31,32,
 32,34,35,36,37,38,39,41,42,42,43,44,45,46,47,48,
 48,50,51,51,52,52,53,55,56,57,58,59,60,60,61,63]